Pipe-coupling.



J. N. GOODALL. PIPE COUPLING.

APPLICATION FILED JAN. 27, 1913.

1,182,086. Patented Mar.16,191-5.

0AM WZZ WW y w A9 .20 ,2 /4 Q W UNITED STATES PATENT OFFICE.

JOHN N. GOODALL, F MEL-ROSE, MASSACHUSETTS;

PIPE-COUPLING.

Specification of Letters Patent.

Patented Mar. 16, 1915..

Application filed January 27, 1913. .Serial No. 744,291.

' To all whom it may concern:

Be it known that I, JOHN N. GoonALL, of

Melrose, in the county of Middlesex and couplings.

One object of the invention is to so construct a pipe couplingcomprising a pair of collars, for attachment to pipes, and a bridge orspanner to span the space between said collars that said bridge orspanner may yield somewhat to accommodate itself to variations in theextension of the pipes. Another object of the invention is to soconstruct a pipe coupling that a pair of pipe engaging collars may becoupled by a compression bridge member relative to which one of saidcollars may move.

Other objects of the invention will appear from the followingdescription. a

- The invention consists in the novel bridge member and means .forapplying said memher to the collars of the coupling.

. The invention also consists in the proved pipe coupling as shallhereinafter be more fully described and pointed out in the claims.

Figure 1, represents the severalniembei's of the improved pipe couplingin side view.

In carrying this 1111 611131011 into practice "in its preferred form Iconstruct a pair of collars 5 and 6 adapted to be securely mounted onthe ends of two pipes, in approximate alinement, which it is desired tocouple or connect. Collar 5 has the extension screw thread 7 and the endface'8 furnished with the groove 9 having the wall 10 which-is inclinedto the general. axial extension of this collar to form substantially ofsaid bridge member 19 is received a conical spreader member preferablyextending sllghtly beyond the face 8 as will be seen by reference toFigs. 2 and 3. Collar 6 has the enlargement 11 forming the shoulder 12.1 Nut 13 has the flange 14, closely fit t1ng the exterior of collar 6,and the surface 15 which is adapted to receive the enlargement 11 of,collar 6 but is shorter than said enlargement 11 so that when theshoulder 12 of such enlargement 11 is seated against the flange 14 ofsaid nut 13 a groove or receptacle is formed between the periphery ofsaid enlargement 11 and the wall 16 flaring from said surface 15 towardthe bridge chamber 17 of said nut 13, which chamber is ofa diameterpreferably exceeding the internal diameter of the screw thread 18 whichis adapted to receive the similar thread 7 of collar 5. The bridgemember 19 has the inner wall 20 adapted to be received on the conicalspreader 10 of collar 5 and to have a close slidlng fit on theenlargement 11 of collar 6, the edges 21 and 22 of the spanner extendingrespectively into the groove 9 of collar 5 and into the groove formedbetween the periphery of said enlargement 11 and the flaring wall 16 ofnut 13, while the web 23 in the chamber 17 of said nut 13.

The bridge member 19 is ofcomparatively hardmetal but is thin andreadily may be sprung sufliciently that its web 23 may be engaged withthe screw threads 18 of nut 13 and screwed along said thread until said.web or-fin is received by the chamber 17 of said nut 13, in whichchamber-said web or fin is free to move laterally and rotate.

In making use of this coupling to connect the ends of two pipes whichare substantially in alinement the nut 13'is slipped on to collar 6 andthe collars 5 and 6 are screwed or otherwise secured to the respectivepipes. Nut 13 is then slid al'on collar 6 untilthe screw thread 18 ofsai nut is brough to the thread 7 of collar 5 and said nut is t enrotated to engage said threads,

and advance said nut along collar 5 until the edge 21 of bridge member19 enters groove 9. In the continued taking up of nut 13 the flaringwall 16 forces the bridge member along until the engagement of the edge21 of the bridge .member bears on the spreader 10 of collar 5 afterwhich point is reached the continued pressure of:.said wall 16 acts toforce edge 21 over the enlarging conical surface of said spreader while,at.

the :samezt'ime. the flaring wall 16 acts to compress-the edge 22 of thebudge member against the surface of enlargement 11' of -c.ollar 6. Thusthe member 19-bridges the space betweencollars 5- and 6 and the edges21,,and 22 are pressed respectively inwardly and outwardly against thesurfaces of the spreader 10 and of the collar enlargement 11.-

Actual practice demonstrates the fact that while the edge .22 of bridgemember 19 is so compressed against the collar enlargement .11 as to makea tight joint the frictional engagement of these parts permits a degreeof relative movement so that under expan-' sion of pipes connected bythiscoupling the V col lars .5 and 6 may move toward and fromenlargedend, a nut having a screw thread engaging with said screw thread of saidfirst collar and a flange engaging the enlarge ment of said secondcollar, said nut having a flaring wall, and a bridge member locatedbetween the flaring wall of said nut and said conical surface.

2. A coupling comprising a nut having a chamber, a screw thread at oneside of said -chamber, a flange .at the other side of said chamber, astraight wall extending inward from said flange, aflaring wall extendingfrom said-straight wall, and a bridging member having aprojectionextending into the chamber of said nut, in combination with a pair ofcollars having endportions adapted to be drawn into engagement with saidbridging member, one of said collars having a screw thread engaged bysaid collar.

3. A couplingcomprising a pair of collars one of which has an exteriorscrew thread and a V shaped groove in its end, the other of which has anenlarged end, a nut having a bore slidable on said enlargement, a wallflaring from said bore and an internal screw thread engageable with thethread of said first collar, and a bridging member having comparativelythin edges one of which is adapted to be seated in the V shaped grooveof the first collar .and the other of which edges extends into thegroove formed between the enlargement of said second collar and theflaring wall of said nut, substantially as described.

JOHN N. GOODALL.

Witnesses:

HENRY J. MILLER, FRANK S. HEAD.

